CD160, a 27 kDa glycoprotein, was initially identified with the monoclonal antibody BY55. Its expression is tightly associated with peripheral blood NK cells and CD8 T lymphocytes with cytolytic effector activity. The cDNA sequence of CD160 predicts a cysteine rich, glycosylphosphatidylinositol anchored protein of 181 amino acids with a single Ig-like domain weakly homologous to KIR2DL4 molecule.
